Just to catch up on a few meandering posts in this thread:
Affair.tv - I like it, just think of it, allowing the victims of cheaters to post videos of their cheating spouses as they come and go from a "friend's" house.... I suppose it could be controversial, but controversy often means mega traffic surges, so hmmm. You would probably need to find a wife or two to help you get started, and video tape for them. You would need to be very careful regarding the legality of it all, though. Still, by serving up a few example videos, perhaps you could find a buyer?
TeenHardcore.tv - a common term, and very relevant to the extension. With one possible exception, I have stayed away from regging porno names, but sex IS one of the top money movers on the web, so you will find an audience online. Errr, okay, hopefully not YOU having to provide the demo videos, hehe, that goes slightly beyond domain addiction, even!
Placebo.tv - Hmmm, Birthing videos? Or perhaps a business incubator site, with videos on business startups, accounting software reviews, work at home opportunities? Not an easy leap, but still possible with the correct marketing. Main thing is that the traffic would not necessarily match up with the focus f the site. Might take some work to make the site profitable, but I do not think it is out of reach. There are, perhaps, easier domains to pick up, IMO, but there are worse, as well.
As a final thought, I've mentioned this before, and I will reiterate it here, domains like 'thehistorychannel.tv' or 'sex.tv' are no-brainers, obvious winners in this extension. They hold value from the getgo. Domains like "chainsaw.tv" may be of value, but it will be much more of a reach. Still, there will, at some point, be videos introduced for specific products, and who is to say that "chainsaw.tv" won't become a popular site for woodworkers to go to to view chain saw product demos before they spring for some $300 item online?